Drop-wire stop mechanism for warping-machines



(No Model.)v

8 y J. E.. BREST. n y DROP WIRE STOP MECHANISM FOR WARPING MAGHINES.

No. 402,278.l Patented Apr. 80, 1889.

UNITED STATES v PATENT OFFICE..

J OHN E. PREST, OF NORTHBRIDGE, MASSACHUSETTS.

DROP-WIRE STOP MECHN'ISMFOR WARPING-MACHINES.

SPECIFICATION forming part'of Letters Patent No. 402,278, dated April 30, 1889.

" Application tiled September 17, 1888l Serial No. 285 ,585. (No model.)

.tain new and useful Improvement in DropvW'ire Stop Mechanism for warping-Machines, ofv which the following is a description suficiently full, clear, and exact to enable any person skilled in the art to which said invention appertains to make and use the same, ref-f erence beingihad to the accompanying drawings, forming part of this speciiicatiomin which Figure l is a front .elevation showing a group of drop-wires as ordinarily mounted, the bar being represented as broken off; Fig. 2, a side elevationof the same, the bar being shown in vertical transverse section; Fig. 3, aview similar to that in Fig. l, showing my improvement; and Fig. 4, a side elevation showing my improved drop-wires in use, the bar being represented in vertical transverse section.

Like letters and iigures of reference `indicate corresponding parts in the different iigures of the drawings.

My invention relates especially to means for mounting the drop-wires -in the supporting-bar; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to produce a simpler, cheaper, and more veffective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readilyunderstood by all conversant with such matters from the following explanation.

In the drawings, A represents the supporting-bar; B, the drop-wires; C, the lifting-bar, and D the vibrating bar of the stop-motion.

As ordinarily constructed, the supportingbar A is provided with a thickened portion, a', on its lower edge, (see Fig. 2,) and a longitudinally-arran ged dovetail groove, s.

A dovetail plate, m, is inserted in the groove e, the drop-wires B being pivoted to the upper portion of said plate in such a manner `that their pivotal point i is outside the vertical center when said wires are in use.

(See Fig. 2.)

This arrangement of parts, however,

allows the oil, dirt, &c., to. fall down behind the plate m and in a short time clog the hinge or pivot '1f of said wires to such an extent that they will fail to drop and strike the vibrating bar D when a thread, H, breaks. Moreover, it largely increases the expense of construction to cut the groove c, and as the pivot /L is outside the vertical center 0f the plate m, as described, the use of a stop-bar (not shown) to receive the wires as they fall is necessitated.

My invention is designed to obviate these objections; and to that end I make use of means which will be readily understood by all persons conversant with such matters from the following explanation.

The supporting-bar A in my improvement (see Fig. et) is constructed without the thickened portion as, and has a groove, I), form-ed longitudinally in its face, said groove being preferably rectangular in cross-section. A

plate, CZ, is inserted in said groove, a plate, f,

being secured to the face of the bar A and so arranged as to partially overlap said groove to retain said plate d in position therein.

The drop-wires B are hinged to the upper portion of the plate d by a pin, g, which is disposed in side the vertical center of the plate d, (see Fig. 4,) so that the upper edge of the groove b covers the slots 7L in the plate d, in which said wires are pivoted It will readily be seen that by this arrangement it is practically impossible for the wires B to become clogged at their hinges g by the dirt, dac., which accumulates from the yarn. Furthermore, the body of t-he wires, being outside the. `pivotal point, assists greatly in causing them to fall when a thread, vIl, breaks.

The strip or plate f takes the place of the ordinary stop-bar, the wires B resting thereon, as shown by the dotted line in Fig. 4, after having fallen sufficiently to engage the vibrating bar D of the ordinary stop-motion.

Having thus explained my invention, what l claim isl. In a drop-wire stop mechanism forwarping-machines, the plate (l, provided with the slots h, in combination with the wires B, pivoted in said plate with their bodies outside the pivoted point, and the supporting-bar A,

IOO

provided with the grooveb, for receiving said plate, substantially as described.

2. In a drop-Wire stopinechzinisni forwarping-machines, a supporting-bar provided with a longitudinal groove in its face, a plate inserted in said groove, drop-Wires pivoted to said plate and having their bodies outside the pivotal point7 and :i retaining-plate secured to the face of said bar for holding the dropwire plate therein, all being arranged to oper- 1o ate substantially as described.

JOHN E. PREST.

Ti tnesses C. M. SHAW, E. M. SPINNEY. 

